[ccp4bb] Rwork and Rfree in Sfcheck

[Lisa Wang]

Hello all,
I have a complex structure  with resolution 2.7A The total molecular weight
is 80KD, and about 10% is disordered. I refined this structure to R and
Rfree 25.5% and 29.7% with CNS. I also tried refmac5, but the R and Rfree
have no difference with CNS. I use sfcheck of ccp4 to check this structure.
But sfcheck give the R-factor for all relections 29%. and Rfree 33%. Why
sfcheck and CNS give different  R and Rfree?
Which R and Rfree is true?
Best
Lisa